Certification Authorities 
Channel Associated Signaling 
Cost Accounting Standards 
Column Address Strobe 
Country Assistance Strategy 
Chemical Abstract Service 
Channel Associated Signalling 
Calibrated Air Speed 
Central Accounting System 
Centralized Attendant Service 
Collision Avoidance System 
Computerized Autodial System 
Call Accounting System 
Communicating Applications Specificati… 
Content Addressable Storage 
Control Actuation Section 
Calibrated Ancillary System 
Central Alarm Station 
Column Address Select 
Cost Accounting Standard 
Centralized Attendant Services 
Certificate Authorities 
Chief of the Air Staff 
Circuit Associated Signaling 
Communicating Application Specificatio… 
Communications Application Specificati… 
Compressed Air System 
Computer Aided Selling 
Computer Algebra System 
Conditional Access System